Home / 457,721.40-686,582.10-408,732.60

Finding the Fourth Proportional to 457,721.40, 686,582.10 and 408,732.60

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Solution

The fourth proportional to 457,721.40, 686,582.10 and 408,732.60 is: 613,098.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,721.40 : 686,582.10 = 408,732.60 : x
  2. Step 2: Convert to fraction form
    457,721.40/686,582.10 = 408,732.60/x
  3. Step 3: Cross multiply
    457,721.40x = 686,582.10 × 408,732.60
  4. Step 4: Simplify right side
    457,721.40x = 280,628,486,846.46
  5. Step 5: Solve for x
    x = 280,628,486,846.46/457,721.40
  6. Step 6: Final answer
    x = 613,098.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.